Lg Chem, Ltd

Ikjin Choi

Soon Jae Kwon

Hyounsoo Uh

Ingyu Kim

Jinhyeok Choe

Eunjeong Shin

Tae Hoon Kim

Juneho In

Sangwoo Kim

Jung Goo Lee

Nakheon Sung

Jakyu Chun

Seung Ho Moon

A method of producing a sintered magnet is disclosed herein. In some embodiments, a method of producing a sintered magnet comprises, sintering a R—Fe—B based magnetic powder to produce a sintered magnet; wherein the R is Nd, Pr, Dy, Ce or Tb, and infiltrating a eutectic alloy into the sintered magnet, wherein the eutectic alloy contains Pr, Al, Cu and Ga, and wherein infiltration the eutectic alloy includes applying the eutectic alloy to the sintered magnet and heat-treating the sintered magnet to which the eutectic alloy is applied.

Method of producing sintered magnet

A method for manufacturing a sintered magnet according to one embodiment of the present disclosure is provided. The method includes producing an R-T-B-based magnetic powder through a reduction-diffusion method, and sintering the R-T-B-based magnetic powder, wherein R is a rare earth element, and T is a transition metal, and wherein the producing the magnetic powder includes adding a refractory metal sulfide powder to a R-T-B-based raw material.

Manufacturing method of sintered magnet

A magnetic powder and a method for fabricating the same according to an embodiment of the present disclosure are provided. The magnetic powder is powder particles synthesized using a mixture of a rare earth oxide, a raw material, a metal, a metal oxide and a reducing agent, wherein the powder particles are single-phase, the raw material includes at least one of Fe and Co, the metal includes at least one of Ti, Zr, Mn, Mo, V and Si, and the metal oxide includes at least one of MnO, MoO, VO, SiO, ZrOand TiO.

Magnetic powder and method of preparing magnetic powder

A sintered magnet and method of manufacturing the same are disclosed herein. According to an exemplary embodiment, a manufacturing method of a sintered magnet includes mixing the neodymium iron boron (NdFeB)-based powders and rare-earth hydride powders to prepare a mixture, heat-treating the mixture at a temperature of 600 to 850&#xb0; C., and sintering the heat-treated mixture at a temperature of 1000 to 1100&#xb0; C. to prepare the sintered magnet, wherein the rare earth hydride powders are neodymium hydride (NdH) powders or mixed powers of NdHand praseodymium hydride (PrH). In an embodiment, the NdFeB-based powders are prepared by a reduction-diffusion method.

Manufacturing method of sintered magnet, and sintered magnet

A method of preparing magnetic powder includes preparing iron powder by a reduction reaction of iron oxide; preparing magnetic powder by heat-treating a molded article prepared by pressure-molding a mixture containing the iron powder, neodymium oxide, boron and calcium at a pressure of 22 MPa or more; and coating an organic fluoride on a surface of the magnetic powder.

Method of preparing magnetic powder, and magnetic powder

A method for producing a magnetic powder includes the steps of: mixing neodymium oxide, boron, and iron to prepare a first mixture; adding and mixing calcium to the first mixture to prepare a second mixture; mixing an alkali metal with the second mixture to prepare a third mixture; and placing a carbon sheet on the third mixture, placing silica sand (SiOsand) thereon, and then heating the same to a temperature of 800&#xb0; C. to 1100&#xb0; C.

Method for producing magnetic powder and magnetic powder

A method of producing a magnetic powder and a magnetic powder is provided. The method of producing a magnetic powder according to an exemplary embodiment of the present disclosure includes: producing an iron powder by a reduction reaction of iron oxide, producing a magnetic powder using a molded body obtained by press molding a mixture including the iron powder, a rare earth oxide, boron, and calcium at a pressure of 22 MPa or more, and coating a surface of the magnetic powder with ammonium fluoride.

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Daejeon, South Korea

Ikjin Choi